Exactly! Too many people in this thread are making huge judgements based off a very limited knowledge of what is going on in the blockchain space.
I agree with OPs inference that the art market is going to get over saturated, but ETH ecology is not an argument against NFTs. Plenty of alt-chains exist and interchain marketplaces are being built as we speak.
Your understanding is correct, however ETH is moving sharply away from PoW to PoS systems which are significantly less demanding systems in terms of energy requirements. I believe the roadmap expects the full PoS transition to happen this year (a multistage launch that we are partway through).
On top of that, there's other more specialised NFT blockchains like flow which are becoming very popular.
This has happened to me previously on FB. Had an account, of my first and middle names, that I'd stayed up to get when they released that feature on FB. Both short names like LeoMark. Woke up one morning and they'd changed it to LeoMarkus, and given the old account to someone. Pretty sure something similar also happened on LinkedIn.
Was pissed off at the time but pretty happy with no Facebook account these days.